接枝与磺化改性PP非织造布的吸附与电化学解吸性能  

Adsorption and electrochemical desorption properties of grafted and sulfonated PP nonwovens

作　　者：徐小芳 庞沁彧 陶然[1] 林楚楚 朱新生[1,2] XU Xiaofang;PANG Qinyu;TAO Ran;LIN Chuchu;ZHU Xinsheng(Faculty of Textile and Clothing Engineering,Soochow University,Suzhou 215021;Nantong Textile&Silk Industrial Technology Research Institute,Nantong 226004)

机构地区：[1]苏州大学纺织与服装工程学院,江苏苏州215021 [2]南通纺织丝绸产业技术研究院,江苏南通226004

出　　处：《合成纤维工业》2021年第6期12-18,共7页China Synthetic Fiber Industry

基　　金：南通市科技局项目(JC2019088)。

摘　　要：将苯乙烯(St)和丙烯酸(AA)混合接枝到聚丙烯(PP)非织造布表面,再以浓硫酸为磺化剂,制得接枝改性PP非织造布(PP-g-(SPS-co-PAA));再将吸附有铜离子(Cu^(2+))的PP-g-(SPS-co-PAA)在直流电压作用下进行电化学解吸和再生利用;探讨了接枝与磺化改性前后PP非织造布的形貌和微观结构,研究了不同单体比例、电解质种类和电解电压下PP-g-(SPS-co-PAA)对Cu^(2+)的吸附与电化学解吸性能及其可重复利用性。结果表明:St和AA成功接枝到PP非织造布上,而且AA共聚接枝有效地改善了PS的磺化效果;当St与AA体积比为33、硫酸铜溶液作为解吸液、解吸电压为20 V时,PP-g-(SPS-co-PAA)显示出对Cu^(2+)优异的吸附与解吸性能;10次重复吸附与电化学解吸,PP-g-(SPS-co-PAA)对Cu^(2+)的吸附率都在88%以上,吸附量在140 mg/g以上,解吸率在40%~80%,具有良好的可重复利用性。A graft-modified polypropylene nonwoven(PP-g-(SPS-co-PAA))was produced by firstly grafting styrene(St)and acrylic acid(AA)onto the surface of PP nonwovens and then sulfonating in presence of concentrated sulfuric acid.Then,PP-g-(SPS-co-PAA)adsorbed with copper ion(Cu^(2+))was electrochemically desorbed and recycled under the action of direct current voltage.The morphology and microstructure of PP nonwovens were studied before and after grafting and sulfonating.The effects of the monomer proportion,electrolyte types and electric voltage on the adsorption and electrochemical desorption of the PP-g-(SPS-co-PAA)nonwovens for Cu^(2+) and the reusability thereof were investigated.The results showed that St and AA were successfully grafted onto PP nonwovens,and AA graft copolymerization effectively improved the sulfonation effect of PS;PP-g-(SPS-co-PAA)showed excellent adsorption and desorption properties for Cu^(2+) when the volume ratio of St to AA was 33,copper sulfate solution was used as desorption solution and the desorption voltage was 20 V;the adsorption rate of PP-g-(SPS-co-PAA)for Cu^(2+) was higher than 88%,the adsorption capacity was more than 140 mg/g,and the desorption rate was 40%-80%after 10 times of repeated adsorption and electrochemical desorption,indicating fairly good reusability.

关 键 词：聚丙烯非织造布 苯乙烯 丙烯酸 接枝 磺化 吸附 电化学解吸 

分 类 号：TQ342.62[化学工程—化纤工业] TQ342.85